Addition and subtraction

Can you go through this maze so that the numbers you pass add to exactly 100?

Amy has a box containing domino pieces but she does not think it is a complete set. Which of her domino pieces are missing?

Try grouping the dominoes in the ways described. Are there any left over each time? Can you explain why?

Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

Lolla bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lolla have paid for the balloon?

Katie had a pack of 20 cards numbered from 1 to 20. She arranged the cards into 6 unequal piles where each pile added to the same total. What was the total and how could this be done?

How is it possible to predict the card?

Do you notice anything about the solutions when you add and/or subtract consecutive negative numbers?

You are organising a school trip and you need to write a letter to parents to let them know about the day. Use the cards to gather all the information you need.